They shall eat the flesh that night, roasted on the fire; with unleavened bread and bitter herbs they shall eat it.
Moses and Aaron here receive of the Lord what they were afterwards to deliver to the people concerning the ordinance of the passover, to which is prefixed an order for a new style to be observed in their months (Exo 12:1, Exo 12:2): This shall be to you the beginning of months.
Commenting on Exodus 12:1-20
And they shall eat the flesh in that night, roast with fire,.... The night of the fourteenth of Nisan; and as the Jews reckoned their days from the evening preceding, this must be the beginning of the fifteenth day, which being observed, will serve to reconcile some passages relating to this ordinance.
roast with fire--for the sake of expedition; and this difference was always observed between the cooking of the paschal lamb and the other offerings (Ch2 35:13). unleavened bread--also for the sake of despatch (Deu 16:3), but as a kind of corruption (Luk 12:1) there seems to have been a typical meaning under it (Co1 5:8).